Refactor parameterCount to optimize performance #591
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Now that body-parser targets Node.js 18, we can finally use String.split to count all the '&'s in parameterCount body. This makes the function roughly 2x faster, according to this jsperf: https://jsperf.app/niqepi/2 Fun fact: if you run this jsperf in Firefox, the old implementation will get record-breaking speeds, while the _new_ one will be roughly 7x slower. Thankfully, both Chrome/Node and Bun/Safari engines show the opposite results.
wesleytodd
approved these changes
Mar 4, 2025
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I didn't quite see the same results in the micro-benchmark, but it was still an improvement. Additionally it is a nice legibility improvement to simplify this method so even if it was relatively equivalent perf I would not mind merging it. Just going to let it sit to see if anyone else had input.
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Now that body-parser targets Node.js 18, we can finally use String.split to count all the
&s inparameterCountbody. This makes the function roughly 2x faster in Chrome/Node.js engine (and about 2.5x faster in Safari/Bun engine), according to this jsperf: https://jsperf.app/niqepi/2Fun fact: if you run this jsperf in Firefox, the old implementation will get speeds unmatched by any other engine, while the new one will be roughly 7x slower. Thankfully, that's only the case in Firefox.
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